EP2879921B1 - Device for connecting a wiper arm and a wiper blade together including an overmoulded tube - Google Patents

Device for connecting a wiper arm and a wiper blade together including an overmoulded tube Download PDF

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Publication number
EP2879921B1
EP2879921B1 EP13756628.7A EP13756628A EP2879921B1 EP 2879921 B1 EP2879921 B1 EP 2879921B1 EP 13756628 A EP13756628 A EP 13756628A EP 2879921 B1 EP2879921 B1 EP 2879921B1
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EP
European Patent Office
Prior art keywords
tube
wiper
connection device
channel
wiper blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13756628.7A
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German (de)
French (fr)
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EP2879921A1 (en
Inventor
Denis Thebault
Eric Poton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes dEssuyage SAS
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Valeo Systemes dEssuyage SAS
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Publication of EP2879921A1 publication Critical patent/EP2879921A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S1/3848—Flat-type wiper blade, i.e. without harness
    • B60S1/3849—Connectors therefor; Connection to wiper arm; Attached to blade
    • B60S1/3862—Transport of liquid there through
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/40—Connections between blades and arms
    • B60S1/4038—Connections between blades and arms for arms provided with a channel-shaped end
    • B60S1/4045—Connections between blades and arms for arms provided with a channel-shaped end comprising a detachable intermediate element mounted on the channel-shaped end
    • B60S1/4048—Connections between blades and arms for arms provided with a channel-shaped end comprising a detachable intermediate element mounted on the channel-shaped end the element being provided with retention means co-operating with the channel-shaped end of the arm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/52—Arrangement of nozzles; Liquid spreading means
    • B60S1/522—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms
    • B60S1/524—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms arranged in wiper blades

Definitions

  • the field of the present invention is that of equipment for vehicles, and more particularly that of equipment for wiping the windows of a vehicle.
  • the present invention relates to a connection device providing a mechanical connection between a wiper arm and a wiper blade adapted to wipe a windshield or a rear window of the vehicle.
  • Motor vehicles are commonly equipped with a windshield wiper system to sweep and wash the windshield and to prevent the driver's vision from being disturbed.
  • These wipers are conventionally driven by an arm performing an angular reciprocating movement and comprise elongate brushes, themselves carrying scraper blades made of an elastic material. These blades rub against the windshield and evacuate the water by bringing it out of the driver's field of vision.
  • the brushes are made in the form, or, in a conventional version, articulated hoists that hold the scraper blade in several discrete places, or, in a newer version called "flat blade” (for "flat blade”), a semi-rigid set that keeps the scraper blade along its entire length.
  • the blade is attached to the rotating arm of the wiper by a set consisting of a mechanical connector and an adapter.
  • the mechanical connector is a part that is crimped directly on the flat broom, while the adapter is an intermediate piece that allows the attachment of the connector on the arm of the wiper.
  • the mechanical connector mentioned above is manufactured by a molding method, comprising at least one drawer whose extraction makes it possible to generate recesses in which a washing liquid of the windshield can circulate.
  • This molding process requires removal of the drawer at an outer face of the connector. Moreover, this withdrawal generates a sleeve that protrudes from the outer face of the connector.
  • the sleeve is generated on an outer face of the connector at which it may be necessary to create a spray port of the wash liquid on the windshield.
  • the presence of the sleeve then causes the manufacture of the spray orifice, particularly when the position of the sleeve is in interference with the position of the spray orifice.
  • the object of the present invention is therefore to overcome the disadvantages described above by designing a connection device that does not require the use of a drawer to generate a recess in the connection device.
  • the liquid circuit is created by a previously formed tube, around which functional forms of the connection device are overmolded.
  • the invention therefore relates to a connecting device adapted to connect a wiper blade of a window of a vehicle to a wiper arm, comprising at least one securing means on the wiper blade and a means connection with the wiper arm, said connection device comprising a circuit adapted to channel a liquid, characterized in that the circuit is defined by at least one tube and in that the securing means and the connecting means are molded at least partly around the tube.
  • a connection device is recognizable for example by making a section thereof passing through the circuit, and noting the existence of a delimitation between the constituent material of the tube and the material of the connecting device which surrounds at least partially this tube.
  • Such a connection device is still recognizable in that it has no particular shape on the outer surface of the connection device in the extension of the channel, this shape being in particular related to the extraction of the drawer in the manufacturing process of the prior art.
  • the tube delimits a duct which extends according to a longitudinal direction of extension of the connection device, hydraulically connected to a channel which extends along an axis transverse to the longitudinal direction.
  • the tube may delimit a first and a second duct which both extend parallel to the longitudinal extension direction of the connection device.
  • a wiper blade provided with at least a first ramp upstream of the wiper and a second ramp downstream of the wiper, according to the rotational movement of the wiper blade.
  • the wiper blade can thus comprise four ramps, distributed in pairs on either side of the connection device.
  • the tube delimits a pipe in communication with the channel, said pipe extending along an axis contributing to the extension axis of the channel.
  • This pipe supplies liquid to the channel, and thus forms a supply pipe of this channel.
  • connection device may comprise a base in which the duct is formed, said base being surmounted by a flank in which are formed at least in part the channel and the connecting means.
  • the base and the side are thus molded around the tube delimiting the circuit.
  • the securing means may be formed in the base.
  • the pipe is formed in the sidewall.
  • the latter is able to supply the channel with liquid.
  • the pipe delimited by the tube opens out of the sidewall. There is thus formed a tip on which a liquid transport tube of the wiper arm can be threaded.
  • the duct delimited by the tube opens at least one end longitudinal of the base. This duct ensures the distribution of the liquid in two portions of the wiper blade located on either side of the connection device.
  • the opening portions of the conduit form tips on which one or more projection ramps fitted to the wiper blade can be threaded on the end caps.
  • the tube is wholly or partly made of a metallic material.
  • the tube is at least partly made of a synthetic material.
  • the securing means and the connecting means are made of a synthetic material, the latter surrounding all or part of the tube. This is for example a plastic overmolding, in particular filled with fiberglass.
  • connection device may comprise a zone in which is provided at least one projection orifice arranged to project the liquid on the window.
  • a zone forms an outer surface of the base devoid of form after molding in the extension of the channel.
  • the invention also relates to a wiper system of a window of a vehicle, comprising a wiper blade mechanically connected to a wiper arm at least by a connection device as detailed above.
  • the wiper blade comprises at least one projection ramp of a washing liquid of the window supplied with washing liquid by the connecting device.
  • a ramp can be divided into two portions, each extending longitudinally along the wiper blade on either side of the connecting device. These portions may be formed by two air deflectors reported on the wiper blade.
  • a first advantage according to the invention lies in the absence of an overflow sleeve of the connection device, at a zone where it is appropriate to provide one or more projection openings.
  • the aesthetic appearance of the connecting device is significantly improved, since the unsightly shape of the sleeve can be removed.
  • the longitudinal or lateral designations refer to the orientation of the wiper blade or the connection device according to the invention.
  • the longitudinal direction corresponds to the main axis of the wiper blade in which it extends
  • the lateral orientations correspond to intersecting lines, that is to say which intersect the direction longitudinal, in particular perpendicular to the longitudinal axis of the wiper blade in its plane of rotation.
  • the outer or inner names are assessed relative to the point of attachment of the blade on the arm, the inner name corresponding to the part where the arm and a half-blade extend.
  • the directions referenced as higher or lower correspond to orientations perpendicular to the plane of rotation of the wiper blade, the lower denomination containing the plane of the windshield.
  • a wiper system consisting of a wiper arm or wiper arm 1 extending at its outer end by an end piece 2, which is fixed on the inside, for example by a crimping on the arm of the wiper arm. Wiping 1.
  • the end piece 2 cooperates with an adapter carrying a wiper 3 by means of a connection device 7 according to the invention.
  • the adapter is intended, for example, to be inserted in the end piece 2 by a translation movement in a longitudinal direction, to come into a position of use, where it is positioned in abutment against a cooperating shape given to the terminal piece 2. It is then fixed reversibly by means of, for example, a retractable locking button 5, which is fixed at the end of a flexible tongue coming from the adapter and which cooperates with a recess practiced at this effect in the upper part of the end piece 2.
  • the adapter and the connecting device 7 are mechanically connected to one another via a connecting means.
  • this connecting means is a pivot connection formed between the adapter and the connection device 7 according to the invention.
  • the wiper blade 3 is thus maintained in translation vis-à-vis the wiper arm 1, while a rotation around the pivot connection is authorized by the connecting means.
  • a liquid supply tube 4 runs along the wiper arm 1. This tube 4 channels a washing liquid from the windshield to bring it to the level of the connection device 7 between the wiper arm 1 and the wiper arm. wiper blade 3.
  • the wiper blade 3 comprises at least one projection ramp 8 of the washing liquid of the glass.
  • This projection ramp 8 is supplied with washing liquid by the connection device 7.
  • Such a projection ramp 8 can be distributed on either side of the connection device 7 in a first portion referenced 9 and a second portion referenced 10
  • the first portion 9 extends longitudinally along the wiper blade 3, on the inner side thereof, while the second portion 10 extends longitudinally along the wiper blade 3, on the outer side thereof. latest.
  • the first portion 9 and the second portion 10 are both hydraulically connected to the connection device 7.
  • the projection ramp 8 can for example be formed by a tube provided with spraying orifices, then attached to the wiper blade 3. It can also be implemented by an air deflector which caps the wiper blade. wiping 3 and in which is formed, on the one hand, a washing liquid circulation duct extending along the longitudinal direction of the wiper blade 3, and on the other hand a multiplicity of spraying orifices washing liquid.
  • the wiper blade 3 may comprise a support inside which is housed a stiffening vertebra.
  • the support may be provided with two open slots and arranged laterally, these two slots each receiving a stiffening vertebra.
  • the support further comprises a longitudinal cavity in which is threaded a squeegee, otherwise called scanning blade. The latter is a flexible component of the wiper blade 3 bears against the outer face of the windshield.
  • the support On its upper part, the support can be covered by the air deflector arranged to use the dynamic effect of the movement of the vehicle to increase the support force of the wiper blade 3 on the windshield. As mentioned above, this air deflector can also form the projection ramp of which the wiper blade 3 is provided.
  • a driver 6 provided with a hole through which a shaft of a drive motor or linkage passes in order to rotate the wiper system.
  • the figure 2 shows a semifinished part constituting the connection device according to the invention.
  • This is the circuit 11 of the connection device whose function is to channel the washing liquid from the windshield for distribution in each of the portions of the wiper projection boom.
  • This circuit 11 is delimited by at least one tube 12 inside which the washing liquid can circulate.
  • the circuit comprises a first tube hereinafter called channel 13, in hydraulic communication with a second tube, called conduit 14.
  • the circuit 11 comprises a third tube called channel 15, the latter serving to supply washing liquid the channel 13.
  • the duct 14 forms the part of the circuit which distributes the liquid in two opposite directions, towards each of the portions of the projection ramp of the wiper blade.
  • the channel 13 forms the part of the circuit which supplies the conduit 14 with liquid.
  • the conduit 15 forms the circuit part which supplies the channel 13 with liquid.
  • the conduit 15 extends in a longitudinal direction 16 of extension of the connection device.
  • This longitudinal direction 16 is for example rectilinear.
  • the channel 13 extends along a transverse axis 17, for example perpendicular, to the longitudinal direction 16.
  • the channel 13 is notably installed in the center of the duct 14, in the longitudinal direction 16.
  • the pipe 15 extends along an axis 18 intersecting, for example perpendicular to the axis 17 of the channel 13.
  • the axis 18 of the pipe can thus be parallel to the longitudinal direction 16 of extension duct 14.
  • the tube 12 may be metallic, in particular made of an aluminum alloy, brass or steel.
  • the tube 12 may be made of a synthetic material.
  • connection device 7 Referring now to the figure 3 , we see more precisely the connection device 7 according to the invention.
  • This part is defined in an orthonormal coordinate system OX-OY-OZ, where the direction OX represents a longitudinal direction, the direction OZ represents a vertical direction and the direction OY represents a transverse direction.
  • This connection device 7 is arranged to be secured, for example by crimping, the wiper blade which moves on the vehicle windshield. Such a wiper blade is rotated by the wiper arm.
  • connection device 7 provides a so-called complete mechanical connection with the wiper, in that there is no degree of freedom.
  • This complete mechanical connection is provided by a securing means 19 arranged on the connection device 7.
  • the connecting device 7 comprises a base 20 which extends longitudinally and transversely.
  • This base 20 receives the securing means 19 on the wiper blade, and more particularly on a stiffening vertebra of the wiper blade.
  • This securing means 19 takes for example the shape of at least one groove 21 formed in the base 20.
  • the base 20 may comprise two grooves 21 opposite each other and each formed in arms 22 and 23 delimiting the base 20. These two grooves 21 and form hooks adapted to come into taken on the wiper blade.
  • the base 20 is surmounted by a sidewall 24, for example made of material with this base 20.
  • This sidewall 24 has a transverse dimension and a longitudinal dimension smaller than those of the base 20.
  • the sidewall 24 is example centered on the base 20, along the transverse axis OY and the longitudinal axis OX.
  • connection device 7 and the wiper arm, in particular via the adapter, are mechanically connected by a connecting means 25, for example a pivot connection.
  • this pivot connection is implemented by a cavity 26 formed in the sidewall 24.
  • This cavity 26 extends in a direction parallel to the transverse direction OY.
  • the cavity 26 may be a central axis hole parallel to the transverse direction OY.
  • the cavity 26 has a circular section.
  • connection device 7 provides a transport function and distribution of the washing liquid of the windshield. To do this, the connection device 7 comprises the circuit 11 detailed in connection with the figure 2 .
  • the securing means 19 and the connecting means 25 are molded at least partly around the circuit 11, that is to say around the tube 12 forming at least the channel 13.
  • the securing means 19 and the connecting means 25 are molded all around and on the entirety of the tube 12 formed by the conduit 14, the channel 13 and the pipe 15, except of course the orifices at the end of the conduit 14 and the pipe 15. It is understood here that the securing means 19 and the connecting means 25 are overmoulded on the tube 12.
  • the base 20 is at least partially overmolded around the tube 12 forming the conduit 14, while the sidewall 24 is at least partly overmolded around the tube 12 forming the channel 13 and the pipe 15.
  • This overmolding is performed by an injection of synthetic resin inside a mold containing the tube 12.
  • the resin in the liquid state is distributed around the tube 12 and traps it. After solidification, the connection device 7 can be operated.
  • the invention here avoids the use of extractable drawers used during the molding process.
  • the conduit 14 is defined by the tube 12 which extends to form a rectilinear recess, in particular of circular section.
  • This duct 14 extends in the longitudinal direction 16, the latter being parallel to the longitudinal direction OX.
  • Such a duct 14 is formed on one side of the base 20, the latter giving rise to two end pieces 27 which cover two longitudinal ends of the tube 12 forming the duct 14.
  • the washing fluid distribution means constituting the wiper blade for example the air deflector mentioned above, is thus threaded onto each endpiece 27.
  • the sidewall 24 surrounds the tube 12 forming the channel 13 arranged in the connection device 7 to supply liquid to the conduit 14.
  • the channel 13 and the conduit 14 are thus in hydraulic communication with each other.
  • the channel 13 is delimited by the tube 12 which extends rectilinearly along the transverse axis 17 with the conduit 14, advantageously concurrent with the longitudinal direction 16 of the conduit 14.
  • the channel 13 may be disposed perpendicular to the conduit 14.
  • the axis 17 of the channel 13 is orthogonal to the longitudinal direction 16 of the conduit 14.
  • the perpendicular term covers all the positions substantially perpendicular to the channel 13 vis-à-vis the conduit 14, that is to say by incorporating manufacturing tolerances of the connection device 7.
  • the tube 12 is formed such that the channel 13 is connected to the conduit 14 at a particular location of the latter.
  • the channel 13 is thus centered on the duct 14 in the longitudinal direction 16, with respect to two longitudinal ends 28 and 29 bordering the base 20.
  • a first distance separating the axis 17 of the channel 13 from a first end longitudinal 28 of the base 20 is equal, or substantially equal because of manufacturing tolerances, to a second distance that separates this same axis 17 of a second longitudinal end 29 bordering the base 20.
  • Such equality can also be appreciated in view of the terminal edges of the end pieces 27.
  • the perpendicular and centered disposition of the channel 13 with respect to the duct 14 makes it possible to distribute the liquid circulating in the duct in an identical manner on either side of the channel 13.
  • connection device 7 receives the tube 12 so that the pipe 15 is hydraulically connected to the channel 13.
  • This pipe 15 serves to supply liquid to the channel 13, and subsequently the conduit 14.
  • This pipe 15 is delimited by the tube 12 which extends rectilinearly in the side 27, the tube 12 opening out of the connecting device 7 by a nozzle 27 so as to hydraulically connect the connection device to the tube of liquid supply referenced 4 on the figure 1 .
  • This duct 15 extends along the transverse axis 18, in other words concurrent, with the axis 17 of the channel 13.
  • This axis 18 of the duct 15 may for example be parallel to the longitudinal direction 16 along which the duct 14 extends.
  • the connection device 7 may comprise a zone 30 arranged along the conduit 14 for making at least one projection orifice 31 of the liquid on the window wiped by the wiper blade.
  • the zone 30 makes it possible to distribute a plurality of projection orifices 31.
  • Such a zone 30 is devoid of any shape likely to hinder the distribution of the projection orifices 31, in particular thanks to the fact that the connection device is not manufactured. from drawer during the molding operation. There is thus no shape that exceeds the connection device at the zone 30, in the axial extension of the channel 13.
  • This possibility results from the invention, that is to say from the fact that the circuit is defined by a tube around which is molded the rest of the connection device, that is to say at least the securing means and the connecting means.
  • the projection orifices 31 are, for example, holes of transverse axis, and advantageously perpendicular to the longitudinal direction 16 of the duct 14. These holes thus connect the duct 14 to the environment surrounding the connection device 7.
  • this zone 30 is formed on an outer face of the base 20.
  • This zone extends in the longitudinal direction OX, parallel to the conduit 14, and on a given angular sector around the longitudinal direction 16 of the This zone 30 is for example formed on a lower part of the base 20, that is to say, adjacent to the securing means 19.
  • the sidewall 24 overhanging the base 20, it is considered that the zone 30 is arranged on a portion of the outer face of the base 20 opposite the sidewall 24 with respect to the conduit 14.
  • a zone 30 is formed when there is a smooth wall of the outer face of the base 20 which extends longitudinally in the longitudinal direction OX along the conduit 14 on at least 50% of this outer face, this smooth wall then being provided with the projection orifices.
  • the smooth character of the wall is formed when the wall is devoid of shapes likely to hinder the drilling of a projection orifice in the axial extension of the channel 13.
  • the zone is formed by a groove made in the base along the conduit.
  • a groove is recessed towards the duct with respect to the external face which delimits the base.
  • this groove is a rectilinear recess arranged along the duct. The length of the holes forming the projection orifice is thus reduced to the thickness of the tube delimiting the duct in line with the groove.
  • the material used to form the securing means and the connecting means is synthetic. This is for example a polybutylene terephthalate (PBT) or a polyamide filled with 30% glass fibers.
  • PBT polybutylene terephthalate
  • the base 20 and the sidewall 24 can be made from one of these materials.
  • the tube 12 is made from a synthetic resin, it has a melting point higher than the temperature of the resin used to mold the securing means 19 and the connecting means 25, at the time of its injection into the mold to form the connection device 7.
  • the distribution of the projection orifices provided at the zone 30 may be non-constant. In other words, the spacing that separates each pair of projection orifices is different. It may, for example, be scalable and linear, in particular increasing or decreasing from one longitudinal end to the other of the connection device 7.
  • the wiping orifices of the wiper blade and the projection orifices 31 of the connection device 7 can be distributed in the longitudinal direction of the wiper blade so as to observe a non-constant spacing between orifices.
  • the projection orifices formed in the connection device 7 are made in the continuity of the spraying orifices made at the level of the projection ramp of the wiper blade.
  • the distribution principle defined in the document WO2011 / 160952A1 is thus not interrupted by the presence of annoying shape provided on the connection device 7.
  • the variability of such a spacing may be linear, increasing or decreasing from one longitudinal end to the other of the wiper blade constituting the wiper system according to the invention.
  • connection device comprising a single conduit which extends in the longitudinal direction.
  • the invention covers a connection device called bi-ducts, in that it comprises two parallel ducts delimited by the tube, for supplying liquid to a wiper blade comprising upstream and downstream ramps, seen from Rotational movement of this wiper blade.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Body Structure For Vehicles (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Cleaning In General (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Nozzles (AREA)

Description

Le domaine de la présente invention est celui des équipements pour les véhicules, et plus particulièrement celui des équipements pour l'essuyage des vitres d'un véhicule. La présente invention vise un dispositif de connexion assurant une liaison mécanique entre un bras d'essuyage et un balai d'essuyage apte à essuyer un pare-brise ou une vitre arrière du véhicule.The field of the present invention is that of equipment for vehicles, and more particularly that of equipment for wiping the windows of a vehicle. The present invention relates to a connection device providing a mechanical connection between a wiper arm and a wiper blade adapted to wipe a windshield or a rear window of the vehicle.

Les véhicules automobiles sont couramment équipés de système d'essuie-glace pour assurer un balayage et un lavage du pare-brise et éviter que la vision qu'a le conducteur de son environnement ne soit perturbée. Ces essuie-glaces sont classiquement entraînés par un bras effectuant un mouvement de va-et-vient angulaire et comportent des balais allongés, porteurs eux-mêmes de lames racleuses réalisées en une matière élastique. Ces lames frottent contre le pare-brise et évacuent l'eau en l'amenant en dehors du champ de vision du conducteur. Les balais sont réalisés sous la forme, soit, dans une version classique, de palonniers articulés qui tiennent la lame racleuse en plusieurs endroits discrets, soit, dans une version plus récente dénommée "flat blade" (pour "lame plate"), d'un ensemble semi-rigide qui maintient la lame racleuse sur toute sa longueur. Dans cette seconde solution, le balai est rattaché au bras tournant de l'essuie-glace par un ensemble constitué d'un connecteur mécanique et d'un adaptateur. Le connecteur mécanique est une pièce qui est sertie directement sur le balai plat, alors que l'adaptateur est une pièce intermédiaire qui permet la fixation du connecteur sur le bras de l'essuie-glace.Motor vehicles are commonly equipped with a windshield wiper system to sweep and wash the windshield and to prevent the driver's vision from being disturbed. These wipers are conventionally driven by an arm performing an angular reciprocating movement and comprise elongate brushes, themselves carrying scraper blades made of an elastic material. These blades rub against the windshield and evacuate the water by bringing it out of the driver's field of vision. The brushes are made in the form, or, in a conventional version, articulated hoists that hold the scraper blade in several discrete places, or, in a newer version called "flat blade" (for "flat blade"), a semi-rigid set that keeps the scraper blade along its entire length. In this second solution, the blade is attached to the rotating arm of the wiper by a set consisting of a mechanical connector and an adapter. The mechanical connector is a part that is crimped directly on the flat broom, while the adapter is an intermediate piece that allows the attachment of the connector on the arm of the wiper.

Le connecteur mécanique évoqué ci-dessus est fabriqué par un procédé de moulage, comprenant au moins un tiroir dont l'extraction permet de générer des évidements dans lesquels un liquide de lavage du pare-brise peut circuler. Ce procédé de moulage impose un retrait du tiroir au niveau d'une face externe du connecteur. Par ailleurs, ce retrait génère un manchon qui déborde de la face externe du connecteur.The mechanical connector mentioned above is manufactured by a molding method, comprising at least one drawer whose extraction makes it possible to generate recesses in which a washing liquid of the windshield can circulate. This molding process requires removal of the drawer at an outer face of the connector. Moreover, this withdrawal generates a sleeve that protrudes from the outer face of the connector.

Un tel procédé de fabrication présente plusieurs inconvénients.Such a manufacturing method has several disadvantages.

En premier lieu, le manchon est généré sur une face externe du connecteur au niveau de laquelle il peut être nécessaire de créer un orifice de pulvérisation du liquide de lavage sur le pare-brise. La présence du manchon gène alors la fabrication de l'orifice de pulvérisation, en particulier lorsque la position du manchon est en interférence avec la position de l'orifice de pulvérisation.First, the sleeve is generated on an outer face of the connector at which it may be necessary to create a spray port of the wash liquid on the windshield. The presence of the sleeve then causes the manufacture of the spray orifice, particularly when the position of the sleeve is in interference with the position of the spray orifice.

En second lieu, la présence du manchon débordant du connecteur mécanique dégrade l'aspect esthétique général de ce connecteur, en particulier en raison du fait qu'il faut obturer ce manchon par des moyens rapportés sur le connecteur.In the second place, the presence of the sleeve protruding from the mechanical connector degrades the general aesthetic appearance of this connector, in particular due to the fact that it is necessary to close this sleeve by means attached to the connector.

US-A-2011/107541 montre le préambule de la revendication 1. US-2011/107541 shows the preamble of claim 1.

Le but de la présente invention est donc de résoudre les inconvénients décrits ci-dessus en concevant un dispositif de connexion qui ne nécessite pas l'utilisation d'un tiroir pour générer un évidement dans le dispositif de connexion. Le circuit de liquide est créé par un tube préalablement formé, autour duquel des formes fonctionnelles du dispositif de connexion sont surmoulées.The object of the present invention is therefore to overcome the disadvantages described above by designing a connection device that does not require the use of a drawer to generate a recess in the connection device. The liquid circuit is created by a previously formed tube, around which functional forms of the connection device are overmolded.

L'invention a donc pour objet un dispositif de connexion apte à relier un balai d'essuyage d'une vitre d'un véhicule à un bras d'essuyage, comprenant au moins un moyen de solidarisation sur le balai d'essuyage et un moyen de liaison avec le bras d'essuyage, ledit dispositif de connexion comprenant un circuit apte à canaliser un liquide, caractérisé par le fait que le circuit est délimité par au moins un tube et en ce que le moyen de solidarisation et le moyen de liaison sont moulés au moins en partie autour du tube. Un tel dispositif de connexion est reconnaissable par exemple en effectuant une coupe de celui-ci passant par le circuit, et en constatant l'existence d'une délimitation entre le matériau constitutif du tube et la matière du dispositif de connexion qui entoure au moins partiellement ce tube. Un tel dispositif de connexion est encore reconnaissable en ce qu'il ne comporte pas de forme particulière sur la surface externe du dispositif de connexion dans le prolongement du canal, cette forme étant notamment liée à l'extraction du tiroir dans le procédé de fabrication de l'art antérieur.The invention therefore relates to a connecting device adapted to connect a wiper blade of a window of a vehicle to a wiper arm, comprising at least one securing means on the wiper blade and a means connection with the wiper arm, said connection device comprising a circuit adapted to channel a liquid, characterized in that the circuit is defined by at least one tube and in that the securing means and the connecting means are molded at least partly around the tube. Such a connection device is recognizable for example by making a section thereof passing through the circuit, and noting the existence of a delimitation between the constituent material of the tube and the material of the connecting device which surrounds at least partially this tube. Such a connection device is still recognizable in that it has no particular shape on the outer surface of the connection device in the extension of the channel, this shape being in particular related to the extraction of the drawer in the manufacturing process of the prior art.

Selon un exemple de l'invention, le tube délimite un conduit qui s'étend selon une direction longitudinale d'extension du dispositif de connexion, raccordé hydrauliquement à un canal qui s'étend selon un axe transversal à la direction longitudinale.According to an example of the invention, the tube delimits a duct which extends according to a longitudinal direction of extension of the connection device, hydraulically connected to a channel which extends along an axis transverse to the longitudinal direction.

Selon un exemple de réalisation, le tube peut délimiter un premier et un deuxième conduit qui s'étendent tous deux parallèlement à la direction longitudinale d'extension du dispositif de connexion. Une telle solution permet d'alimenter en liquide un balai d'essuyage pourvu d'au moins une première rampe en amont du balai et d'une seconde rampe en aval du balai, selon le mouvement de rotation du balai d'essuyage. De manière particulière, le balai d'essuyage peut ainsi comprendre quatre rampes, réparties deux-à-deux de part et d'autre du dispositif de connexion.According to an exemplary embodiment, the tube may delimit a first and a second duct which both extend parallel to the longitudinal extension direction of the connection device. Such a solution makes it possible to supply liquid to a wiper blade provided with at least a first ramp upstream of the wiper and a second ramp downstream of the wiper, according to the rotational movement of the wiper blade. In particular, the wiper blade can thus comprise four ramps, distributed in pairs on either side of the connection device.

Selon un autre exemple de réalisation, le tube délimite une canalisation en communication avec le canal, ladite canalisation s'étendant selon un axe concourant à l'axe d'extension du canal. Cette canalisation alimente en liquide le canal, et forme ainsi une canalisation d'alimentation de ce canal.According to another embodiment, the tube delimits a pipe in communication with the channel, said pipe extending along an axis contributing to the extension axis of the channel. This pipe supplies liquid to the channel, and thus forms a supply pipe of this channel.

Le dispositif de connexion selon l'invention peut comprendre une embase dans laquelle est ménagé le conduit, ladite embase étant surmontée par un flanc dans lequel sont ménagés au moins en partie le canal et le moyen de liaison. L'embase et le flanc sont ainsi moulés autour du tube délimitant le circuit.The connection device according to the invention may comprise a base in which the duct is formed, said base being surmounted by a flank in which are formed at least in part the channel and the connecting means. The base and the side are thus molded around the tube delimiting the circuit.

On notera que le moyen de solidarisation peut être ménagé dans l'embase.Note that the securing means may be formed in the base.

De manière optionnelle, la canalisation est formée dans le flanc. Cette dernière est apte à alimenter en liquide le canal.Optionally, the pipe is formed in the sidewall. The latter is able to supply the channel with liquid.

Selon un exemple de l'invention, la canalisation délimitée par le tube débouche du flanc. Il est ainsi formé un embout sur lequel un tube de transport de liquide du bras d'essuyage peut être enfilé.According to an example of the invention, the pipe delimited by the tube opens out of the sidewall. There is thus formed a tip on which a liquid transport tube of the wiper arm can be threaded.

Le conduit délimité par le tube débouche d'au moins une extrémité longitudinale de l'embase. Ce conduit assure la distribution du liquide dans deux portions du balai d'essuyage situées de part et d'autre du dispositif de connexion. Les parties débouchantes du conduit forment des embouts sur lesquels une ou plusieurs rampes de projection équipant le balai d'essuyage peuvent être enfilées sur les embouts.The duct delimited by the tube opens at least one end longitudinal of the base. This duct ensures the distribution of the liquid in two portions of the wiper blade located on either side of the connection device. The opening portions of the conduit form tips on which one or more projection ramps fitted to the wiper blade can be threaded on the end caps.

Selon un mode de réalisation, le tube est tout ou partie réalisé en une matière métallique. Alternativement, le tube est au moins en partie réalisé en une matière synthétique.According to one embodiment, the tube is wholly or partly made of a metallic material. Alternatively, the tube is at least partly made of a synthetic material.

Le moyen de solidarisation et le moyen de liaison, notamment l'embase et le flanc du dispositif de connexion, sont réalisés en une matière synthétique, cette dernière entourant tout ou partie du tube. Il s'agit par exemple d'un surmoulage de matière plastique, notamment chargée en fibres de verre.The securing means and the connecting means, in particular the base and the flank of the connection device, are made of a synthetic material, the latter surrounding all or part of the tube. This is for example a plastic overmolding, in particular filled with fiberglass.

Le dispositif de connexion selon l'invention peut comporter une zone dans laquelle est ménagé au moins un orifice de projection agencé pour projeter le liquide sur la vitre. Une telle zone forme une surface externe de l'embase dépourvue de forme issue de moulage dans le prolongement du canal.The connection device according to the invention may comprise a zone in which is provided at least one projection orifice arranged to project the liquid on the window. Such a zone forms an outer surface of the base devoid of form after molding in the extension of the channel.

L'invention concerne également un système d'essuyage d'une vitre d'un véhicule, comprenant un balai d'essuyage relié mécaniquement à un bras d'essuyage au moins par un dispositif de connexion tel que détaillé ci-dessus.The invention also relates to a wiper system of a window of a vehicle, comprising a wiper blade mechanically connected to a wiper arm at least by a connection device as detailed above.

Dans une telle situation, le balai d'essuyage comprend au moins une rampe de projection d'un liquide de lavage de la vitre alimentée en liquide de lavage par le dispositif de connexion. Une telle rampe peut être scindée en deux portions, chacune s'étendant longitudinalement le long du balai d'essuyage de part et d'autre du dispositif de connexion. Ces portions peuvent être formées par deux déflecteurs d'air rapportés sur le balai d'essuyage.In such a situation, the wiper blade comprises at least one projection ramp of a washing liquid of the window supplied with washing liquid by the connecting device. Such a ramp can be divided into two portions, each extending longitudinally along the wiper blade on either side of the connecting device. These portions may be formed by two air deflectors reported on the wiper blade.

Un tout premier avantage selon l'invention réside dans l'absence de manchon débordant du dispositif de connexion, au niveau d'une zone où il est approprié de ménager un ou des orifices de projection.A first advantage according to the invention lies in the absence of an overflow sleeve of the connection device, at a zone where it is appropriate to provide one or more projection openings.

Une telle absence permet de positionner un ou des orifices de projection sur le dispositif de connexion sans que ce positionnement ne soit gêné par la présence d'un manchon débordant. Un tel effet est particulièrement intéressant pour respecter un principe de répartition des orifices de projection tout le long de la direction d'extension longitudinale du balai d'essuyage, y compris au niveau du dispositif de connexion. Un exemple de ce principe est notamment exposé dans le document WO2011/160952A1 .Such an absence makes it possible to position one or more projection orifices on the connection device without this positioning being impeded by the presence of an overflowing sleeve. Such an effect is particularly advantageous to respect a principle of distribution of the projection orifices along the direction of longitudinal extension of the wiper blade, including at the connection device. An example of this principle is set out in the document WO2011 / 160952A1 .

En outre, l'aspect esthétique du dispositif de connexion est significativement amélioré, puisque la forme disgracieuse du manchon peut être supprimée.In addition, the aesthetic appearance of the connecting device is significantly improved, since the unsightly shape of the sleeve can be removed.

D'autres caractéristiques, détails et avantages de l'invention ressortiront plus clairement à la lecture de la description donnée ci-après à titre indicatif en relation avec des dessins dans lesquels :

  • la figure 1 est une vue générale, en perspective, d'un système d'essuyage pour un vitrage d'un véhicule automobile selon l'invention,
  • la figure 2 est une vue en perspective d'un tube employé dans le dispositif de connexion selon l'invention,
  • la figure 3 est une vue en perspective d'un dispositif de connexion selon l'invention.
Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below as an indication in relation to drawings in which:
  • the figure 1 is a general perspective view of a wiper system for a glazing unit of a motor vehicle according to the invention,
  • the figure 2 is a perspective view of a tube used in the connection device according to the invention,
  • the figure 3 is a perspective view of a connection device according to the invention.

Il faut noter que les figures exposent l'invention de manière détaillée pour mettre en oeuvre l'invention, lesdites figures pouvant bien entendu servir à mieux définir l'invention le cas échéant.It should be noted that the figures disclose the invention in detail to implement the invention, said figures can of course be used to better define the invention where appropriate.

Dans la suite de la description, les dénominations longitudinales ou latérales se réfèrent à l'orientation du balai d'essuyage ou du dispositif de connexion selon l'invention. La direction longitudinale correspond à l'axe principal du balai d'essuyage dans lequel il s'étend, alors que les orientations latérales correspondent à des droites concourantes, c'est-à-dire qui croisent la direction longitudinale, notamment perpendiculaires à l'axe longitudinal du balai d'essuyage dans son plan de rotation. Pour les directions longitudinales, les dénominations extérieure ou intérieure s'apprécient par rapport au point de fixation du balai sur le bras, la dénomination intérieure correspondant à la partie où le bras et un demi-balai s'étendent. Enfin, les directions référencées comme supérieures ou inférieures correspondent à des orientations perpendiculaires au plan de rotation du balai d'essuyage, la dénomination inférieure contenant le plan du pare-brise.In the remainder of the description, the longitudinal or lateral designations refer to the orientation of the wiper blade or the connection device according to the invention. The longitudinal direction corresponds to the main axis of the wiper blade in which it extends, while the lateral orientations correspond to intersecting lines, that is to say which intersect the direction longitudinal, in particular perpendicular to the longitudinal axis of the wiper blade in its plane of rotation. For the longitudinal directions, the outer or inner names are assessed relative to the point of attachment of the blade on the arm, the inner name corresponding to the part where the arm and a half-blade extend. Finally, the directions referenced as higher or lower correspond to orientations perpendicular to the plane of rotation of the wiper blade, the lower denomination containing the plane of the windshield.

En se référant tout d'abord à la figure 1, on voit un système d'essuyage composé d'un porte-balai ou bras d'essuyage 1 se prolongeant à son extrémité extérieure par une pièce terminale 2, qui est fixée, du côté intérieur, par exemple par un sertissage sur le bras d'essuyage 1. La pièce terminale 2 coopère avec un adaptateur porteur d'un balai d'essuyage 3 par l'intermédiaire d'un dispositif de connexion 7 selon l'invention. L'adaptateur a vocation à, par exemple, s'insérer dans la pièce terminale 2 par un mouvement de translation selon une direction longitudinale, pour venir dans une position d'utilisation, où il est positionné en butée contre une forme coopérante donnée à la pièce terminale 2. Il y est alors fixé de façon réversible au moyen, par exemple, d'un bouton escamotable de verrouillage 5, qui est fixé en extrémité d'une languette flexible issue de l'adaptateur et qui coopère avec un évidement pratiqué à cet effet dans la partie supérieure de la pièce terminale 2.Referring first to the figure 1 there is shown a wiper system consisting of a wiper arm or wiper arm 1 extending at its outer end by an end piece 2, which is fixed on the inside, for example by a crimping on the arm of the wiper arm. Wiping 1. The end piece 2 cooperates with an adapter carrying a wiper 3 by means of a connection device 7 according to the invention. The adapter is intended, for example, to be inserted in the end piece 2 by a translation movement in a longitudinal direction, to come into a position of use, where it is positioned in abutment against a cooperating shape given to the terminal piece 2. It is then fixed reversibly by means of, for example, a retractable locking button 5, which is fixed at the end of a flexible tongue coming from the adapter and which cooperates with a recess practiced at this effect in the upper part of the end piece 2.

L'adaptateur et le dispositif de connexion 7 sont reliés mécaniquement l'un à l'autre par l'intermédiaire d'un moyen de liaison. Selon un exemple de réalisation, ce moyen de liaison est une liaison pivot ménagée entre l'adaptateur et le dispositif de connexion 7 selon l'invention. Le balai d'essuyage 3 est ainsi maintenu en translation vis-à-vis du bras d'essuyage 1, alors qu'une rotation autour de la liaison pivot est autorisée par le moyen de liaison.The adapter and the connecting device 7 are mechanically connected to one another via a connecting means. According to an exemplary embodiment, this connecting means is a pivot connection formed between the adapter and the connection device 7 according to the invention. The wiper blade 3 is thus maintained in translation vis-à-vis the wiper arm 1, while a rotation around the pivot connection is authorized by the connecting means.

Un tube 4 d'amenée de liquide chemine le long du bras d'essuyage 1. Ce tube 4 canalise un liquide de lavage du pare-brise pour l'amener au niveau du dispositif de connexion 7 entre le bras d'essuyage 1 et le balai d'essuyage 3.A liquid supply tube 4 runs along the wiper arm 1. This tube 4 channels a washing liquid from the windshield to bring it to the level of the connection device 7 between the wiper arm 1 and the wiper arm. wiper blade 3.

Le balai d'essuyage 3 comprend au moins une rampe de projection 8 du liquide de lavage de la vitre. Cette rampe de projection 8 est alimentée en liquide de lavage par le dispositif de connexion 7. Une telle rampe de projection 8 peut être répartie de part et d'autre du dispositif de connexion 7 en une première portion référencée 9 et une deuxième portion référencée 10. La première portion 9 s'étend longitudinalement le long du balai d'essuyage 3, du côté intérieur de celui-ci, alors que la deuxième portion 10 s'étend longitudinalement le long du balai d'essuyage 3, du côté extérieur de ce dernier. La première portion 9 et la deuxième portion 10 sont toutes deux raccordées hydrauliquement au dispositif de connexion 7.The wiper blade 3 comprises at least one projection ramp 8 of the washing liquid of the glass. This projection ramp 8 is supplied with washing liquid by the connection device 7. Such a projection ramp 8 can be distributed on either side of the connection device 7 in a first portion referenced 9 and a second portion referenced 10 The first portion 9 extends longitudinally along the wiper blade 3, on the inner side thereof, while the second portion 10 extends longitudinally along the wiper blade 3, on the outer side thereof. latest. The first portion 9 and the second portion 10 are both hydraulically connected to the connection device 7.

La rampe de projection 8 peut par exemple être formée par un tube pourvu d'orifices d'aspersion, puis rapportée sur le balai d'essuyage 3. Elle peut également être mise en oeuvre par un déflecteur d'air qui coiffe le balai d'essuyage 3 et dans lequel est ménagé, d'une part un conduit de circulation du liquide de lavage qui s'étend le long de la direction longitudinale du balai d'essuyage 3, et d'autre part une multiplicité d'orifices d'aspersion du liquide de lavage.The projection ramp 8 can for example be formed by a tube provided with spraying orifices, then attached to the wiper blade 3. It can also be implemented by an air deflector which caps the wiper blade. wiping 3 and in which is formed, on the one hand, a washing liquid circulation duct extending along the longitudinal direction of the wiper blade 3, and on the other hand a multiplicity of spraying orifices washing liquid.

Le balai d'essuyage 3 peut comprendre un support à l'intérieur duquel est logée une vertèbre de rigidification. Alternativement, le support peut être pourvu de deux fentes ouvertes et disposées latéralement, ces deux fentes recevant chacune une vertèbre de rigidification. Le support comprend encore une cavité longitudinale dans laquelle est enfilée une raclette, autrement appelée lame de balayage. Cette dernière est un composant souple du balai d'essuyage 3 en appui contre la face extérieure du pare-brise.The wiper blade 3 may comprise a support inside which is housed a stiffening vertebra. Alternatively, the support may be provided with two open slots and arranged laterally, these two slots each receiving a stiffening vertebra. The support further comprises a longitudinal cavity in which is threaded a squeegee, otherwise called scanning blade. The latter is a flexible component of the wiper blade 3 bears against the outer face of the windshield.

Sur sa partie supérieure, le support peut être recouvert par le déflecteur d'air agencé pour utiliser l'effet dynamique du déplacement du véhicule pour augmenter la force d'appui du balai d'essuyage 3 sur le pare-brise. Comme évoqué plus haut, ce déflecteur d'air peut également former la rampe de projection dont le balai d'essuyage 3 est pourvu.On its upper part, the support can be covered by the air deflector arranged to use the dynamic effect of the movement of the vehicle to increase the support force of the wiper blade 3 on the windshield. As mentioned above, this air deflector can also form the projection ramp of which the wiper blade 3 is provided.

A l'extrémité opposée à la pièce terminale 2 par rapport au bras d'essuyage 1, on trouve un entraîneur 6 pourvu d'un trou au travers duquel un arbre d'un moteur d'entraînement ou d'une tringlerie passe en vue de mettre en rotation le système d'essuyage.At the end opposite to the end piece 2 relative to the wiper arm 1, there is a driver 6 provided with a hole through which a shaft of a drive motor or linkage passes in order to rotate the wiper system.

La figure 2 montre une partie semi-finie constitutive du dispositif de connexion selon l'invention. Il s'agit du circuit 11 du dispositif de connexion dont la fonction est de canaliser le liquide de lavage du pare-brise pour le distribuer dans chacune des portions de la rampe de projection du balai d'essuyage.The figure 2 shows a semifinished part constituting the connection device according to the invention. This is the circuit 11 of the connection device whose function is to channel the washing liquid from the windshield for distribution in each of the portions of the wiper projection boom.

Ce circuit 11 est délimité par au moins un tube 12 à l'intérieur duquel le liquide de lavage peut circuler. Selon l'exemple de la figure 2, le circuit comprend un premier tube ci-après appelé canal 13, en communication hydraulique avec un deuxième tube, appelé conduit 14. De manière optionnelle, le circuit 11 comprend un troisième tube appelé canalisation 15, cette dernière servant à alimenter en liquide de lavage le canal 13.This circuit 11 is delimited by at least one tube 12 inside which the washing liquid can circulate. According to the example of the figure 2 , the circuit comprises a first tube hereinafter called channel 13, in hydraulic communication with a second tube, called conduit 14. Optionally, the circuit 11 comprises a third tube called channel 15, the latter serving to supply washing liquid the channel 13.

Le conduit 14 forme la partie du circuit qui distribue le liquide selon deux sens opposés, vers chacune des portions de la rampe de projection du balai d'essuyage. Le canal 13 forme la partie du circuit qui alimente en liquide le conduit 14. Enfin, la canalisation 15 forme la partie de circuit qui alimente en liquide le canal 13.The duct 14 forms the part of the circuit which distributes the liquid in two opposite directions, towards each of the portions of the projection ramp of the wiper blade. The channel 13 forms the part of the circuit which supplies the conduit 14 with liquid. Finally, the conduit 15 forms the circuit part which supplies the channel 13 with liquid.

Le conduit 15 s'étend selon une direction longitudinale 16 d'extension du dispositif de connexion. Cette direction longitudinale 16 est par exemple rectiligne. Le canal 13 s'étend selon un axe 17 transversal, et par exemple perpendiculaire, à la direction longitudinale 16. Le canal 13 est notamment installé au centre du conduit 14, selon la direction longitudinale 16.The conduit 15 extends in a longitudinal direction 16 of extension of the connection device. This longitudinal direction 16 is for example rectilinear. The channel 13 extends along a transverse axis 17, for example perpendicular, to the longitudinal direction 16. The channel 13 is notably installed in the center of the duct 14, in the longitudinal direction 16.

La canalisation 15 s'étend quant à elle le long d'un axe 18 concourant, par exemple perpendiculaire, à l'axe 17 du canal 13. L'axe 18 de la canalisation peut ainsi être parallèle à la direction longitudinale 16 d'extension du conduit 14.The pipe 15 extends along an axis 18 intersecting, for example perpendicular to the axis 17 of the channel 13. The axis 18 of the pipe can thus be parallel to the longitudinal direction 16 of extension duct 14.

Selon un exemple de réalisation, le tube 12 peut être métallique, notamment réalisé en un alliage d'aluminium, en laiton ou en acier. Alternativement, le tube 12 peut être réalisé en un matériau synthétique.According to an exemplary embodiment, the tube 12 may be metallic, in particular made of an aluminum alloy, brass or steel. Alternatively, the tube 12 may be made of a synthetic material.

En se référant maintenant à la figure 3, on voit plus précisément le dispositif de connexion 7 selon l'invention. Cette pièce est définie dans un repère orthonormé OX-OY-OZ, où la direction OX représente une direction longitudinale, la direction OZ représente une direction verticale et la direction OY représente une direction transversale.Referring now to the figure 3 , we see more precisely the connection device 7 according to the invention. This part is defined in an orthonormal coordinate system OX-OY-OZ, where the direction OX represents a longitudinal direction, the direction OZ represents a vertical direction and the direction OY represents a transverse direction.

Ce dispositif de connexion 7 est agencé pour être rendu solidaire, par exemple par sertissage, du balai d'essuyage qui se déplace sur le pare-brise de véhicule. Un tel balai d'essuyage est entraîné en rotation par le bras d'essuyage.This connection device 7 is arranged to be secured, for example by crimping, the wiper blade which moves on the vehicle windshield. Such a wiper blade is rotated by the wiper arm.

Le dispositif de connexion 7 assure une liaison mécanique dite complète avec le balai d'essuyage, en ce sens qu'il n'existe pas de degré de liberté. Cette liaison mécanique complète est assurée par un moyen de solidarisation 19 agencé sur le dispositif de connexion 7.The connection device 7 provides a so-called complete mechanical connection with the wiper, in that there is no degree of freedom. This complete mechanical connection is provided by a securing means 19 arranged on the connection device 7.

Le dispositif de connexion 7 comprend une embase 20 qui s'étend longitudinalement et transversalement. Cette embase 20 reçoit le moyen de solidarisation 19 sur le balai d'essuyage, et plus particulièrement sur une vertèbre de rigidification de ce balai d'essuyage. Ce moyen de solidarisation 19 prend par exemple la forme d'au moins une saignée 21 ménagée dans l'embase 20.The connecting device 7 comprises a base 20 which extends longitudinally and transversely. This base 20 receives the securing means 19 on the wiper blade, and more particularly on a stiffening vertebra of the wiper blade. This securing means 19 takes for example the shape of at least one groove 21 formed in the base 20.

Selon un exemple de réalisation, l'embase 20 peut comprendre deux saignées 21 opposées l'une à l'autre et chacune ménagée dans des bras 22 et 23 délimitant l'embase 20. Ces deux saignées 21 forment ainsi des crochets aptes à venir en prise sur le balai d'essuyage.According to an exemplary embodiment, the base 20 may comprise two grooves 21 opposite each other and each formed in arms 22 and 23 delimiting the base 20. These two grooves 21 and form hooks adapted to come into taken on the wiper blade.

L'embase 20 est surmontée d'un flanc 24, par exemple issu de matière avec cette embase 20. Ce flanc 24 présente une dimension transversale et une dimension longitudinale inférieures à celles de l'embase 20. Le flanc 24 est par exemple centré sur l'embase 20, selon l'axe transversal OY et l'axe longitudinal OX.The base 20 is surmounted by a sidewall 24, for example made of material with this base 20. This sidewall 24 has a transverse dimension and a longitudinal dimension smaller than those of the base 20. The sidewall 24 is example centered on the base 20, along the transverse axis OY and the longitudinal axis OX.

Le dispositif de connexion 7 et le bras d'essuyage, notamment via l'adaptateur, sont reliés mécaniquement par un moyen de liaison 25, par exemple une liaison pivot. En ce qui concerne le dispositif de connexion 7, cette liaison pivot est mise en oeuvre par une cavité 26 réalisée dans le flanc 24. Cette cavité 26 s'étend selon une direction parallèle à la direction transversale OY. En d'autres termes, la cavité 26 peut être un trou d'axe central parallèle à la direction transversale OY. Dans le plan OXZ, la cavité 26 présente une section circulaire.The connection device 7 and the wiper arm, in particular via the adapter, are mechanically connected by a connecting means 25, for example a pivot connection. As regards the connection device 7, this pivot connection is implemented by a cavity 26 formed in the sidewall 24. This cavity 26 extends in a direction parallel to the transverse direction OY. In other words, the cavity 26 may be a central axis hole parallel to the transverse direction OY. In the plane OXZ, the cavity 26 has a circular section.

Le dispositif de connexion 7 assure une fonction de transport et de distribution du liquide de lavage du pare-brise. Pour ce faire, le dispositif de connexion 7 comprend le circuit 11 détaillé en rapport avec la figure 2.The connection device 7 provides a transport function and distribution of the washing liquid of the windshield. To do this, the connection device 7 comprises the circuit 11 detailed in connection with the figure 2 .

Selon l'invention, le moyen de solidarisation 19 et le moyen de liaison 25 sont moulés au moins en partie autour du circuit 11, c'est-à-dire autour du tube 12 formant au moins le canal 13. De manière avantageuse, le moyen de solidarisation 19 et le moyen de liaison 25 sont moulés tout autour et sur l'intégralité du tube 12 formé par le conduit 14, le canal 13 et la canalisation 15, à l'exception bien entendu des orifices à l'extrémité du conduit 14 et de la canalisation 15. On comprend ici que le moyen de solidarisation 19 et le moyen de liaison 25 sont surmoulés sur le tube 12.According to the invention, the securing means 19 and the connecting means 25 are molded at least partly around the circuit 11, that is to say around the tube 12 forming at least the channel 13. Advantageously, the securing means 19 and the connecting means 25 are molded all around and on the entirety of the tube 12 formed by the conduit 14, the channel 13 and the pipe 15, except of course the orifices at the end of the conduit 14 and the pipe 15. It is understood here that the securing means 19 and the connecting means 25 are overmoulded on the tube 12.

L'embase 20 est au moins en partie surmoulée autour du tube 12 formant le conduit 14, alors que le flanc 24 est au moins en partie surmoulé autour du tube 12 formant le canal 13 et la canalisation 15.The base 20 is at least partially overmolded around the tube 12 forming the conduit 14, while the sidewall 24 is at least partly overmolded around the tube 12 forming the channel 13 and the pipe 15.

Ce surmoulage est réalisé par une injection de résine synthétique à l'intérieur d'un moule contenant le tube 12. La résine à l'état liquide se répartie tout autour du tube 12 et emprisonne celui-ci. Après solidification, le dispositif de connexion 7 peut être exploité. L'invention évite ici l'emploi de tiroirs extractibles utilisés pendant le procédé de moulage.This overmolding is performed by an injection of synthetic resin inside a mold containing the tube 12. The resin in the liquid state is distributed around the tube 12 and traps it. After solidification, the connection device 7 can be operated. The invention here avoids the use of extractable drawers used during the molding process.

Le conduit 14 est délimité par le tube 12 qui s'étend de manière à former un évidement rectiligne, notamment de section circulaire. Ce conduit 14 s'étend selon la direction longitudinale 16, cette dernière étant parallèle à la direction longitudinale OX. Un tel conduit 14 est ménagé sur un côté de l'embase 20, cette dernière donnant naissance à deux embouts 27 qui recouvrent deux extrémités longitudinales du tube 12 formant le conduit 14.The conduit 14 is defined by the tube 12 which extends to form a rectilinear recess, in particular of circular section. This duct 14 extends in the longitudinal direction 16, the latter being parallel to the longitudinal direction OX. Such a duct 14 is formed on one side of the base 20, the latter giving rise to two end pieces 27 which cover two longitudinal ends of the tube 12 forming the duct 14.

Le moyen de distribution du liquide de lavage constitutif du balai d'essuyage, par exemple le déflecteur d'air évoqué plus haut, est ainsi enfilé sur chaque embout 27.The washing fluid distribution means constituting the wiper blade, for example the air deflector mentioned above, is thus threaded onto each endpiece 27.

Le flanc 24 entoure le tube 12 formant le canal 13 agencé dans le dispositif de connexion 7 pour alimenter en liquide le conduit 14. Le canal 13 et le conduit 14 sont ainsi en communication hydraulique l'un avec l'autre. Le canal 13 est délimité par le tube 12 qui s'étend de manière rectiligne selon l'axe 17 transversal avec le conduit 14, avantageusement concourant avec la direction longitudinale 16 du conduit 14.The sidewall 24 surrounds the tube 12 forming the channel 13 arranged in the connection device 7 to supply liquid to the conduit 14. The channel 13 and the conduit 14 are thus in hydraulic communication with each other. The channel 13 is delimited by the tube 12 which extends rectilinearly along the transverse axis 17 with the conduit 14, advantageously concurrent with the longitudinal direction 16 of the conduit 14.

Selon un exemple de réalisation, le canal 13 peut être disposé de manière perpendiculaire au conduit 14. En d'autres termes, l'axe 17 du canal 13 est orthogonal à la direction longitudinale 16 du conduit 14. Le terme perpendiculaire couvre tous les positionnements sensiblement perpendiculaires du canal 13 vis-à-vis du conduit 14, c'est-à-dire en y incorporant les tolérances de fabrication du dispositif de connexion 7.According to an exemplary embodiment, the channel 13 may be disposed perpendicular to the conduit 14. In other words, the axis 17 of the channel 13 is orthogonal to the longitudinal direction 16 of the conduit 14. The perpendicular term covers all the positions substantially perpendicular to the channel 13 vis-à-vis the conduit 14, that is to say by incorporating manufacturing tolerances of the connection device 7.

Selon un mode exemplatif de l'invention, le tube 12 est formé de telle sorte que le canal 13 soit raccordé au conduit 14 en un endroit particulier de ce dernier. Le canal 13 est ainsi centré sur le conduit 14 selon la direction longitudinale 16, par rapport à deux extrémités longitudinales 28 et 29 bordant l'embase 20. Autrement dit, une première distance séparant l'axe 17 du canal 13 d'une première extrémité longitudinale 28 de l'embase 20 est égale, ou sensiblement égale en raison des tolérances de fabrication, à une deuxième distance qui sépare ce même axe 17 d'une deuxième extrémité longitudinale 29 bordant l'embase 20. Une telle égalité peut également s'apprécier aux regards de bords terminaux des embouts 27.According to an exemplary embodiment of the invention, the tube 12 is formed such that the channel 13 is connected to the conduit 14 at a particular location of the latter. The channel 13 is thus centered on the duct 14 in the longitudinal direction 16, with respect to two longitudinal ends 28 and 29 bordering the base 20. In other words, a first distance separating the axis 17 of the channel 13 from a first end longitudinal 28 of the base 20 is equal, or substantially equal because of manufacturing tolerances, to a second distance that separates this same axis 17 of a second longitudinal end 29 bordering the base 20. Such equality can also be appreciated in view of the terminal edges of the end pieces 27.

La disposition perpendiculaire et centrée du canal 13 par rapport au conduit 14 permet de répartir le liquide circulant dans le conduit de manière identique de part et d'autre du canal 13.The perpendicular and centered disposition of the channel 13 with respect to the duct 14 makes it possible to distribute the liquid circulating in the duct in an identical manner on either side of the channel 13.

Selon un exemple de réalisation, le dispositif de connexion 7 reçoit le tube 12 de manière à ce que la canalisation 15 soit reliée hydrauliquement au canal 13. Cette canalisation 15 a pour fonction d'alimenter en liquide le canal 13, et de manière subséquente le conduit 14. Cette canalisation 15 est délimitée par le tube 12 qui s'étend de manière rectiligne dans le flanc 27, le tube 12 débouchant du dispositif de connexion 7 par un embout 27 de manière à raccorder hydrauliquement le dispositif de connexion au tube d'alimentation en liquide référencé 4 sur la figure 1. Cette canalisation 15 s'étend selon l'axe 18 transversal, autrement dit concourant, avec l'axe 17 du canal 13. Cet axe 18 de la canalisation 15 peut par exemple être parallèle à la direction longitudinale 16 le long de laquelle le conduit 14 s'étend.According to an exemplary embodiment, the connection device 7 receives the tube 12 so that the pipe 15 is hydraulically connected to the channel 13. This pipe 15 serves to supply liquid to the channel 13, and subsequently the conduit 14. This pipe 15 is delimited by the tube 12 which extends rectilinearly in the side 27, the tube 12 opening out of the connecting device 7 by a nozzle 27 so as to hydraulically connect the connection device to the tube of liquid supply referenced 4 on the figure 1 . This duct 15 extends along the transverse axis 18, in other words concurrent, with the axis 17 of the channel 13. This axis 18 of the duct 15 may for example be parallel to the longitudinal direction 16 along which the duct 14 extends.

Selon un exemple de l'invention, le dispositif de connexion 7 peut comprendre une zone 30 aménagée le long du conduit 14 permettant de réaliser au moins un orifice de projection 31 du liquide sur la vitre essuyé par le balai d'essuyage. Avantageusement, la zone 30 permet de répartir une pluralité d'orifices de projection 31. Une telle zone 30 est dépourvue de forme susceptible de gêner la répartition des orifices de projection 31, notamment grâce au fait que le dispositif de connexion n'est pas fabriqué à partir de tiroir pendant l'opération de moulage. Il n'existe ainsi pas de forme qui déborde du dispositif de connexion au niveau de la zone 30, dans le prolongement axial du canal 13. Cette possibilité résulte de l'invention, c'est-à-dire du fait que le circuit est délimité par un tube autour duquel on moule le reste du dispositif de connexion, c'est-à-dire au moins le moyen dé solidarisation et le moyen de liaison.According to an example of the invention, the connection device 7 may comprise a zone 30 arranged along the conduit 14 for making at least one projection orifice 31 of the liquid on the window wiped by the wiper blade. Advantageously, the zone 30 makes it possible to distribute a plurality of projection orifices 31. Such a zone 30 is devoid of any shape likely to hinder the distribution of the projection orifices 31, in particular thanks to the fact that the connection device is not manufactured. from drawer during the molding operation. There is thus no shape that exceeds the connection device at the zone 30, in the axial extension of the channel 13. This possibility results from the invention, that is to say from the fact that the circuit is defined by a tube around which is molded the rest of the connection device, that is to say at least the securing means and the connecting means.

Le ou les orifices de projection 31 sont par exemple des trous d'axe transversal, et avantageusement perpendiculaire, à la direction longitudinale 16 du conduit 14. Ces trous relient ainsi le conduit 14 au milieu environnant le dispositif de connexion 7.The projection orifices 31 are, for example, holes of transverse axis, and advantageously perpendicular to the longitudinal direction 16 of the duct 14. These holes thus connect the duct 14 to the environment surrounding the connection device 7.

Selon un exemple de réalisation, cette zone 30 est ménagée sur une face externe de l'embase 20. Cette zone s'étend selon la direction longitudinale OX, parallèlement au conduit 14, et sur un secteur angulaire déterminé autour de la direction longitudinale 16 du conduit 14. Cette zone 30 est par exemple formée sur une partie inférieure de l'embase 20, c'est-à-dire de manière adjacente au moyen de solidarisation 19.According to an exemplary embodiment, this zone 30 is formed on an outer face of the base 20. This zone extends in the longitudinal direction OX, parallel to the conduit 14, and on a given angular sector around the longitudinal direction 16 of the This zone 30 is for example formed on a lower part of the base 20, that is to say, adjacent to the securing means 19.

Le flanc 24 surplombant l'embase 20, on considère que la zone 30 est aménagée sur une portion de la face externe de l'embase 20 opposée au flanc 24 par rapport au conduit 14.The sidewall 24 overhanging the base 20, it is considered that the zone 30 is arranged on a portion of the outer face of the base 20 opposite the sidewall 24 with respect to the conduit 14.

Selon un exemple de réalisation, il est ainsi considéré qu'une zone 30 est formée dès lors qu'il existe une paroi lisse de la face externe de l'embase 20 qui s'étend longitudinalement selon la direction longitudinale OX le long du conduit 14 sur au moins 50% de cette face externe, cette paroi lisse étant alors pourvu des orifices de projection. Le caractère lisse de la paroi est formé dès lors que la paroi est dépourvue de formes susceptibles de gêner le perçage d'un orifice de projection dans le prolongement axial du canal 13.According to an exemplary embodiment, it is thus considered that a zone 30 is formed when there is a smooth wall of the outer face of the base 20 which extends longitudinally in the longitudinal direction OX along the conduit 14 on at least 50% of this outer face, this smooth wall then being provided with the projection orifices. The smooth character of the wall is formed when the wall is devoid of shapes likely to hinder the drilling of a projection orifice in the axial extension of the channel 13.

Selon un autre exemple non illustré, la zone est formée par une rainure pratiquée dans l'embase le long du conduit. Une telle rainure est en retrait vers le conduit par rapport à la face externe qui délimite l'embase. En d'autres termes, cette rainure est une-cavité rectiligne aménagée le long du conduit. La longueur des trous formant orifice de projection est ainsi réduite à l'épaisseur du tube délimitant le conduit au droit de la rainure.According to another non-illustrated example, the zone is formed by a groove made in the base along the conduit. Such a groove is recessed towards the duct with respect to the external face which delimits the base. In other words, this groove is a rectilinear recess arranged along the duct. The length of the holes forming the projection orifice is thus reduced to the thickness of the tube delimiting the duct in line with the groove.

La matière utilisée pour former le moyen de solidarisation et le moyen de liaison est synthétique. Il s'agit par exemple d'un polybutylene terephthalate (PBT) ou un polyamide chargé de fibres de verre à 30%. Ainsi, l'embase 20 et le flanc 24 peuvent être réalisés à partir de l'une de ces matières. Dans le cas où le tube 12 est réalisé à partir d'une résine synthétique, celle-ci présente un point de fusion supérieure à la température de la résine utilisée pour mouler le moyen de solidarisation 19 et le moyen de liaison 25, au moment de son injection dans le moule pour former le dispositif de connexion 7.The material used to form the securing means and the connecting means is synthetic. This is for example a polybutylene terephthalate (PBT) or a polyamide filled with 30% glass fibers. Thus, the base 20 and the sidewall 24 can be made from one of these materials. In the case where the tube 12 is made from a synthetic resin, it has a melting point higher than the temperature of the resin used to mold the securing means 19 and the connecting means 25, at the time of its injection into the mold to form the connection device 7.

On notera que la répartition des orifices de projection ménagés au niveau de la zone 30 peut être non-constante. En d'autres termes, l'espacement qui sépare chaque couple d'orifices de projection est différent. Il peut, par exemple, être évolutif et linéaire, notamment croissant ou décroissant d'une extrémité longitudinale à l'autre du dispositif de connexion 7.It will be noted that the distribution of the projection orifices provided at the zone 30 may be non-constant. In other words, the spacing that separates each pair of projection orifices is different. It may, for example, be scalable and linear, in particular increasing or decreasing from one longitudinal end to the other of the connection device 7.

Dans le système d'essuyage selon l'invention, on note que les orifices d'aspersion du balai d'essuyage et les orifices de projection 31 du dispositif de connexion 7 peuvent être répartis selon la direction longitudinale du balai d'essuyage de manière à respecter un espacement non constant entre orifices. En d'autres termes, les orifices de projection ménagés dans le dispositif de connexion 7 sont réalisés dans la continuité des orifices d'aspersion réalisés au niveau de la rampe de projection du balai d'essuyage. Le principe de répartition défini dans le document WO2011/160952A1 n'est ainsi pas interrompu par la présence de forme gênante ménagée sur le dispositif de connexion 7.In the wiper system according to the invention, it is noted that the wiping orifices of the wiper blade and the projection orifices 31 of the connection device 7 can be distributed in the longitudinal direction of the wiper blade so as to observe a non-constant spacing between orifices. In other words, the projection orifices formed in the connection device 7 are made in the continuity of the spraying orifices made at the level of the projection ramp of the wiper blade. The distribution principle defined in the document WO2011 / 160952A1 is thus not interrupted by the presence of annoying shape provided on the connection device 7.

Selon un exemple, la variabilité d'un tel espacement peut être linéaire, de manière croissante ou décroissante d'une extrémité longitudinale à l'autre du balai d'essuyage constitutif du système d'essuyage selon l'invention.In one example, the variability of such a spacing may be linear, increasing or decreasing from one longitudinal end to the other of the wiper blade constituting the wiper system according to the invention.

Les modes de réalisation décrits ci-dessus décrivent un dispositif de connexion comprenant un unique conduit qui s'étend selon la direction longitudinale. L'invention couvre cependant un dispositif de connexion appelé bi-conduits, en ce sens qu'il comprend deux conduits parallèles délimités par le tube, en vue d'alimenter en liquide un balai d'essuyage comprenant des rampes amont et aval, vu du mouvement de rotation de ce balai d'essuyage.The embodiments described above describe a connection device comprising a single conduit which extends in the longitudinal direction. The invention however covers a connection device called bi-ducts, in that it comprises two parallel ducts delimited by the tube, for supplying liquid to a wiper blade comprising upstream and downstream ramps, seen from Rotational movement of this wiper blade.

Claims (13)

  1. Connection device (7) which can connect a wiper (3) for a window of a vehicle to a wiper arm (1), comprising at least one means (19) for securing on the wiper (3), and a means (25) for connection with the wiper arm (1), said connection device (7) comprising a circuit (11) which can channel a liquid, characterized in that the circuit (11) is delimited by at least one tube (12), and in that the securing means (19) and the connection means (25) are molded at least partly around the tube (12).
  2. Device according to Claim 1, in which the tube (12) delimits a duct (14) which extends according to a longitudinal direction of extension (16) of the connection device (7), which is connected hydraulically to a channel (13) which extends according to an axis (17) transverse to the longitudinal direction (16).
  3. Device according to Claim 2, in which the tube (12) delimits piping (15) in communication with the channel (13), said piping (15) extending according to an axis (18) which intersects the axis of extension (17) of the channel (13).
  4. Device according to either of Claims 2 and 3, comprising a base (20) in which the duct (14) is provided, said base (20) being surmounted by a flank (24) in which the channel (13) and the connection means (25) are arranged at least partly.
  5. Device according to Claim 4, in which the securing means (19) are arranged in the base (20).
  6. Device according to either of Claims 4 and 5, in which the piping (15) is formed in the flank (24).
  7. Device according to any one of Claims 4 to 6, in which the piping (15) formed by the tube (12) opens from the flank (24) via a joining piece (27).
  8. Device according to any one of Claims 4 to 7, in which the duct (14) which is formed by the tube (12) opens from at least one longitudinal end (28, 29) of the base (20) via a joining piece (27).
  9. Device according to any one of the preceding claims, in which the tube (12) is at least partly made of a metal material.
  10. Device according to any one of the preceding claims, in which the securing means (19) and the connection means (25) are made of a synthetic material.
  11. Device according to any one of the preceding claims, in which at least one spraying orifice (31) is provided, which is designed to spray the liquid onto the window.
  12. System for wiping a window of a vehicle, comprising a wiper (3) which is connected mechanically to a wiper arm (1) at least by a connection device (7) according to any one of the preceding claims.
  13. System according to Claim 12, in which the wiper (3) comprises at least one ramp (8) for spraying a liquid for washing the window, which ramp is supplied with washing liquid by the connection device (7).
EP13756628.7A 2012-08-02 2013-07-30 Device for connecting a wiper arm and a wiper blade together including an overmoulded tube Active EP2879921B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1257517A FR2994144B1 (en) 2012-08-02 2012-08-02 CONNECTION DEVICE BETWEEN A WIPER ARM AND A WIPER, COMPRISING A OVERMOLD TUBE
PCT/FR2013/051839 WO2014020279A1 (en) 2012-08-02 2013-07-30 Device for connecting a wiper arm and a wiper blade together including an overmoulded tube

Publications (2)

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EP2879921A1 EP2879921A1 (en) 2015-06-10
EP2879921B1 true EP2879921B1 (en) 2016-09-21

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US (1) US10065607B2 (en)
EP (1) EP2879921B1 (en)
JP (1) JP6370782B2 (en)
CN (1) CN104619561B (en)
BR (1) BR112015001951A2 (en)
FR (1) FR2994144B1 (en)
MX (1) MX350371B (en)
RU (1) RU2627894C2 (en)
WO (1) WO2014020279A1 (en)

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EP3190013B1 (en) * 2016-01-07 2019-07-31 Taizhou Valeo Wenling Automotive Systems Co. Ltd. An adapter, nozzle structure, assembly consisting of the adapter and the nozzle structure and the assemblihng method thereof
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BR112015001951A2 (en) 2017-07-04
US10065607B2 (en) 2018-09-04
EP2879921A1 (en) 2015-06-10
CN104619561A (en) 2015-05-13
MX2015001517A (en) 2015-04-08
RU2015106887A (en) 2016-09-20
RU2627894C2 (en) 2017-08-14
CN104619561B (en) 2017-03-08
US20150258966A1 (en) 2015-09-17
JP2015523281A (en) 2015-08-13
FR2994144B1 (en) 2014-08-29
JP6370782B2 (en) 2018-08-08
WO2014020279A1 (en) 2014-02-06
FR2994144A1 (en) 2014-02-07
MX350371B (en) 2017-09-04

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